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 TM 9-2330 -326 -14&P
H-37. AUTOMATIC SLACK ADJUSTERS (Cont.)
BRAKE TROUBLESHOOTING
NOTE
The ASA is NOT a cure -all for foundation brake deficiencies.
If the proper push rod stroke cannot be maintained be sure to
thoroughly check the other brake components.
This check could also avoid unnecessary ASA replacement.
1.
Check the foundation brake for:
a.
Worn cam shaft and bushings
b.
Broken shoe return springs
c.
Air chambers not releasing
d.
Worn or broken brake components
e.
Loose wheel bearings
2.
Check the ASA for:
a.
Proper push rod stroke
b.
Proper ASA installation
c.
Loose, broken, or bent adjuster brackets
d.
Worn clutch assembly
e.
Adjuster not fully rel easing
AXLE REPLACEMENT:
It is recommended that the following items be replaced on semitrailers when new axles are installed
to ensure safe operation. The following is for the dual axle semitrailer and are listed in the TM
RPSTL:
PART
QUANTITY PER AXLE /TRUNNION
Adjustment Plates
2
Spring Seats
2
Rubber Pads
4
U-Bolts
4
Spring End Cap Bolts
8
Spring End Cap Washers
16
Spring End Cap Locking Nuts
8
Spring End Cap Locking Nut Washers
8
Trunnion Bushings
2
Trunnion U-Bolt Washers
8
Trunnio n Hub Hex Nuts
8
Follow the TM instructions for installation (See H-38, Page H-173)
Check end caps for damage, replace if damaged.
Spring seats must be tack welded in place when axles are adjusted parallel to each other and
perpendicular to trunnion tube.
Weld the spring seats to the axle using 3/8" welds. Assemble axle U-bolts to spring end caps.
Axles must be aligned using the kingpin as the center point.
Adjustment plates must be welded after axle has been aligned.
Torque:
H-164
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